CN112165203B

CN112165203B - Motor structure

Info

Publication number: CN112165203B
Application number: CN202011025227.3A
Authority: CN
Inventors: 马洪涛
Original assignee: Ningbo Jingcheng Motor Co ltd
Current assignee: Ningbo Jingcheng Motor Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-08-31
Anticipated expiration: 2040-09-25
Also published as: CN112165203A

Abstract

The invention provides a motor structure, which comprises a motor shell, a motor body, a bearing fixing seat and a bearing, wherein the motor shell is provided with a bearing; a boss is convexly arranged at the bottom of the motor shell, and a seat cavity is arranged in the boss; the bearing fixing seat is arranged in the seat cavity; the bearing is arranged in the bearing fixing seat; the motor body is arranged in the motor shell, and the main shaft of the motor body extends into a bearing hole of the bearing; the main shaft can rotate in the bearing hole; by adopting the scheme provided by the invention, the holding force of the self-aligning bearing can be effectively reduced, and the locking of the bearing is avoided, so that the friction force between the main shaft and the bearing is reduced, the noise is reduced, the service life of the bearing can be effectively prolonged, the aligning force of the bearing is increased, and the probability of the main shaft being locked is reduced.

Description

Motor structure

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a motor structure.

Background

In the current motor structure, the bearing fixing seat cannot be fixed, so that the bearing fixing seat can rotate, the failure mode that the self-aligning bearing loses the self-aligning function is common, and the failure mode is more in the industries of a generator and a motor.

The self-aligning bearing is generally connected with the main shaft, and the self-aligning bearing is fixed on the bearing fixing seat to have the function of aligning; when the main shaft rotates, a torsion force is applied to the bearing, the bearing can transmit the torsion force to the bearing fixing seat, when the torsion force reaches a certain value or under the condition of high temperature, the bearing fixing seat can creep, the shape and the size can be changed, the bearing fixing seat is loosened, and the self-aligning bearing is driven to rotate; if the bearing fixing seat is loosened, the bearing fixing seat and the self-aligning bearing rotate together with the shaft, and then the self-aligning bearing loses the self-aligning function; the shaft can generate certain curvature when rotating, and after the aligning bearing loses the aligning force, the shaft can be jammed due to the self curvature and the deviation from the center, or the shaft is broken under other acting forces.

Most bearing fixing base is in order not hard up to rotate more use interference fit on the existing market, generally through design strengthening rib isotructure, this design shortcoming lies in that the assembly is inconvenient, need great power to remove the installation, and because the material of own is the working of plastics mostly, so after the interference fit installation, can produce deformation, increase self-aligning bearing's holding power easily, the lock that dies the bearing, thereby increase the frictional force of axle and bearing, send out the noise, reduce the life of bearing, reduce bearing alignment power, increase the dead probability of axle by the card.

The existing market also has a design scheme for fixing the bearing fixing seat by using glue, namely the glue is coated on the bottom surface of the bearing fixing seat to stick the bearing fixing seat and the shell, the defect of the scheme is that the uniform distribution of the glue cannot be ensured due to the processing technology, meanwhile, the quantity of the glue is not well controlled, the glue is too much used, after the bearing fixing seat is pressed into the shell, the glue overflows to stick the bearing, so that the bearing cannot realize the aligning function, and the shaft is blocked when the shaft is bent and needs to be aligned; when the torque force applied by the axial bearing reaches the peak value, the glue cannot well adhere to the bearing fixing seat and the shell, the bearing fixing seat rotates, and a failure mode that the bearing is locked is caused.

Based on the technical problems existing in the motor bearing fixing, no relevant solution is provided; there is therefore a pressing need to find effective solutions to the above problems.

Disclosure of Invention

The invention aims to provide a motor structure aiming at the defects in the prior art, and solves the problem of locking of the bearing of the existing motor.

The invention provides a motor structure, which comprises a motor shell, a motor body, a bearing fixing seat and a bearing, wherein the motor shell is provided with a bearing; a boss is convexly arranged at the bottom of the motor shell, and a seat cavity is arranged in the boss; the bearing fixing seat is arranged in the seat cavity; the bearing is arranged in the bearing fixing seat; the motor body is arranged in the motor shell, and the main shaft of the motor body extends into a bearing hole of the bearing; the main shaft can rotate in the bearing hole.

Further, a concave cavity is formed in the bottom of the seat cavity; the top of the bearing fixing seat is provided with a convex seat; the bearing fixing seat is abutted in the concave cavity through the convex seat.

Furthermore, the convex seat is of a waist-shaped structure; the concave cavity is a waist-shaped groove and is matched with the convex seat.

Furthermore, a plurality of clamping jaws are distributed on the circumferential direction of the bearing fixing seat, and gaps are formed between the adjacent clamping jaws; bearing cavities are formed in the clamping jaws; the bearing fixing seat is clamped in the seat cavity, the bearing is arranged in the bearing cavity, and the plurality of clamping jaws clamp the bearing.

Furthermore, the cross section of the bearing fixing seat is circular, the cross section of the bearing cavity is circular or elliptical, and the cross section of the bearing is circular or elliptical.

Furthermore, one end of the clamping jaw is provided with a limiting block.

Further, the bearing fixing seat is made of PA36+ GF15% material.

Further, the bearing is an iron-brass sintered oil-containing alloy.

The invention provides a motor structure which can effectively reduce the holding force of a self-aligning bearing and avoid the locking of the bearing, thereby reducing the friction force between a main shaft and the bearing, reducing the noise, effectively prolonging the service life of the bearing, increasing the aligning force of the bearing and reducing the probability of the main shaft being blocked.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The invention will be further explained with reference to the drawings, in which:

FIG. 1 is a perspective view of a motor construction of the present invention;

FIG. 2 is a cross-sectional view of a motor housing of the present invention;

FIG. 3 is a front view of a motor construction of the present invention;

FIG. 4 is a sectional view taken along A-A of FIG. 3;

FIG. 5 is a front view of the bearing retainer of the present invention;

FIG. 6 is a first perspective view of the bearing fixing base of the present invention;

FIG. 7 is a second perspective view of the bearing fixing base of the present invention;

FIG. 8 is a first perspective view of the bearing of the present invention;

fig. 9 is a second perspective view of the bearing of the present invention.

In the figure: 1. a motor; 11. a motor housing; 12. a boss 13 and a seat cavity; 14. a concave cavity; 2. a motor body; 21. a main shaft; 3. a bearing fixing seat; 31. a boss; 32. a clamping jaw; 33. a gap; 34. a limiting block; 35. a bearing cavity; 4. a bearing; 41. and a bearing hole.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 9, the present invention provides a motor structure, which includes a motor 1, specifically, the motor 1 includes a motor housing 11, a motor body 2, a bearing fixing seat 3 and a bearing 4; wherein, the bottom of the motor shell 11 is convexly provided with a boss 12, a seat cavity 13 is arranged inside the boss 12, and the seat cavity 13 is used for installing the bearing fixing seat 3; the bearing fixing seat 3 is arranged in the seat cavity 13, and the bearing 4 is arranged in the bearing fixing seat 3, so that a bearing mounting structure is formed; further, the motor body 2 is arranged in the motor shell 11, and the main shaft 21 of the motor body extends into the bearing hole 41 of the bearing 4; and the main shaft 21 can rotate in the bearing hole 41; the motor structure provided by the invention can effectively solve the problem of bearing locking, namely the problem that the bearing is locked when the bearing fixing seat can not well fix the bearing due to the torsion applied to the bearing by the main shaft; in the scheme, the bearing fixing seat is matched with the boss of the motor shell through the design of the boss, and the boss can effectively fix the bearing fixing seat through simulation calculation so as to prevent the bearing from being locked; meanwhile, the bearing mounting structure is simple in forming, convenient to position and mount and free of influence on the retaining force and the centering force of the bearing.

Preferably, in combination with the above solution, as shown in fig. 1 to 9, the bottom of the seat cavity 13 is provided with a concave cavity 14; the top of the bearing fixing seat 3 is provided with a convex seat 31; the bearing fixing seat 3 is abutted in the concave cavity 14 through the convex seat 31; by adopting the scheme, the waist-shaped convex seat 31 is designed at the bottom end of the bearing fixing seat 3, meanwhile, the concave cavity is designed at the bottom in the motor shell and matched with the convex seat of the bearing fixing seat to fix the bearing fixing seat, and the waist-shaped convex seat can effectively fix the bearing fixing seat and prevent the bearing from being locked by simulation calculation; meanwhile, the design is simple in forming and convenient to position and install, and the influence on the retaining force and the centering force of the bearing is avoided.

Preferably, in combination with the above solutions, as shown in fig. 1 to 9, the boss 31 is a waist-shaped structure; the concave cavity 14 is a waist-shaped groove and is matched with the convex seat 31; by adopting the scheme, the invention provides the motor structure, when a large torsion or high-temperature creep deformation is applied to the bearing fixing seat, the bearing fixing seat can be effectively fixed, and the aligning function of the aligning bearing is ensured; through the calculated magnitude of the torque force applied to the bearing fixing seat by the main shaft of the motor body, after various shape design schemes are simulated, the best processing is performed while the performance requirement of the waist shape is ensured; the waist-shaped structure can stably fix the position of the bearing fixing seat, prevent the bearing fixing seat from deforming after high-temperature creep or loosening to rotate after high torque, and can better help automatic assembly and positioning due to the design of the waist-shaped structure; meanwhile, the waist-shaped structure is more attractive and tidy in performance meeting the requirement, and axial rotation is avoided.

Preferably, in combination with the above solution, as shown in fig. 1 to 9, a plurality of clamping jaws 32 are distributed on the circumference of the bearing fixing seat 3, and a gap 33 is formed between adjacent clamping jaws 32, so that the bearing fixing seat can be effectively fixed when a large torsion or a creep deformation caused by a high temperature is applied to the bearing fixing seat; further, a bearing cavity 35 is formed in the plurality of clamping jaws 32, so that the bearing fixing seat 3 can be clamped in the seat cavity 13; further, bearing 4 sets up in bearing cavity 35 to make many clamping jaws 32 press from both sides tight bearing 4, adopt above-mentioned scheme, after the various shape design schemes of simulation, obtain the clamping jaw and press from both sides tight structure best when guaranteeing the performance demand, the position of bearing fixing base can be fixed to the clamping jaw can be stable, prevents that bearing fixing base from receiving high temperature creep after deformation or receiving loosening behind the big torsion and taking place the rotation.

Preferably, in combination with the above solutions, as shown in fig. 1 to 9, the cross section of the bearing fixing seat 3 is circular, the cross section of the bearing cavity 35 is circular or elliptical, and the cross section of the bearing 4 is circular or elliptical; specifically, the bearing fixing seat 3 is a cylindrical structure; the bearing cavity 35 is embodied as a spherical or ellipsoidal structure, and correspondingly the bearing 4 is spherical or ellipsoidal.

Preferably, in combination with the above solution, as shown in fig. 1 to 9, one end of the clamping jaw 32 is provided with a stopper 34, and the stopper 34 is used for mounting and positioning the automation equipment by providing the stopper 34 at one end of the clamping jaw 32.

Preferably, in combination with the above solution, as shown in fig. 1 to 9, the bearing fixing seat 3 is made of PA46+ GF15% material; specifically, PA46 refers to polytetramethyleneadipamide, GF refers to glass fiber; by adopting the materials, the fixing stability of the bearing fixing seat can be effectively improved, the bearing fixing seat is prevented from rotating, and the service life of the bearing fixing seat is prolonged.

Preferably, in combination with the above, as shown in fig. 1 to 9, the bearing 4 is made of an alloy material, specifically, an iron-brass system sintered oil-containing alloy.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous possible variations and modifications to the described embodiments, or modify equivalent embodiments, without departing from the scope of the invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.

Claims

1. A motor structure is characterized by comprising a motor shell (11), a motor body (2), a bearing fixing seat (3) and a bearing (4); a boss (12) is convexly arranged at the bottom of the motor shell (11), and a seat cavity (13) is arranged in the boss (12); the bearing fixing seat (3) is arranged in the seat cavity (13); the bearing (4) is arranged in the bearing fixing seat (3); the motor body (2) is arranged in the motor shell (11), and a main shaft (21) of the motor body extends into a bearing hole (41) of the bearing (4); the main shaft (21) can rotate in the bearing hole (41); a concave cavity (14) is formed at the bottom of the seat cavity (13); the top of the bearing fixing seat (3) is provided with a convex seat (31); the bearing fixing seat (3) is abutted in the concave cavity (14) through the convex seat (31); a plurality of clamping jaws (32) are distributed on the circumferential direction of the bearing fixing seat (3), and gaps (33) are formed between the adjacent clamping jaws (32); a bearing cavity (35) is formed in the clamping jaws (32); the bearing fixing seat (3) is clamped in the seat cavity (13), the bearing (4) is arranged in the bearing cavity (35), and the clamping jaws (32) clamp the bearing; one end of the clamping jaw (32) is provided with a limiting block (34); the bearing fixing seat (3) is made of PA46+ GF15% material; the bearing (4) is made of iron-brass sintered oil-containing alloy.

2. The electric machine structure according to claim 1, characterized in that the boss (31) is of a kidney-shaped configuration; the concave cavity (14) is a waist-shaped groove and is matched with the convex seat (31).

3. A machine arrangement according to claim 1, characterized in that the cross-section of the bearing holder (3) is circular, the cross-section of the bearing cavity (35) is circular or oval, and the cross-section of the bearing (4) is circular or oval.